HR: 14:10h
AN: A43D-02    [Abstracts]
TI: Wider Caribbean Temperature Anomalies in the Lower Stratosphere and Surface Following the 1982 El Chichón Volcanic Eruption.
AU: * Antuna, J
EM: anadelia@caonao.cu
AF: Instituto Meteorologia, Camaguey Meteorological Center Carretera Nuevitas km 7, Camaguey, Cam 70100, Cuba
AB: Using available surface data from meteorological stations and lower troposphere measurements from a satellite instrument, monthly mean anomalies of the lower stratosphere and surface temperature over the Wider Caribbean region were studied following the 1982 El Chichón volcanic eruption. Global and regional temperature anomalies both in the lower stratosphere and surface are compared. In the lower stratosphere the well known global decaying temperature trend is the same for the region, with more variability as it was expected. Signals from El Chichón and Mt. Pinatubo are present both in the global and regional anomalies. In the surface there are positive anomalies during almost all the 1982 year, associated to the El Nino event. The seven strongest El Nino events after 1949 were selected. The series of Wider Caribbean monthly mean temperature anomalies regional averages for the seven El Niño events was calculated. Then superposed epoch analysis was used to determine the mean trend for the ensemble of the seven events. Then the El Niño event effect over the monthly mean temperature anomalies for 1982 was subtracted. Results reveal the sensitivity of the Wider Caribbean region to the type of radiative forcing produced by volcanic clouds. Comparisons with former results for individual sites in the region are conducted.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0370 Volcanic effects (8409)
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly